Diethyl ketone , and

The following are examples of the above procedure. A mixture of diethylamine and re-butyl alcohol may be separated by adding sufficient dilute sulphuric acid to neutralise the base steam distillation will remove the alcohol. The amine can be recovered by adding sodium hydroxide to the residue and repeating the distillation. A mixture of diethyl ketone and acetic acid may be treated with sufficient dilute sodium hydroxide solution to transform the acid into sodium acetate and distilling the aqueous mixture. The ketone will pass over in the steam and the non-volatile, stable salt will remain in the flask. Acidification with dilute sulphuric acid hberates acetic acid, which can be isolated by steam distillation or by extraction. 

In a similar manner N-(2-ethyl)butylidenepiperidinium hexachlorostannate gives mostly diethyl ketone and only a little of 2-ethylbutanal when a fresh solution is ozonized. If allowed to stand for a period of time, the only product obtained by ozonolysis is 2-ethylbutanal 16). 

TABLE 3 5. Reaction of Aldehydes with the Enolate from Diethyl Ketone and Bromoborane (R,R)-55b... 

S)-4-methyl-3-heptanone (146), the alarm pheromone of the leafcutting ant Atta texarta is about 400 times more active than its optical isomer. This acyclic ketone (146) could be prepared by simply starting from diethyl ketone and propyliodide. 

Problem 15.49 By rapid test-tube reactions distinguish between (a) pentanal and diethyl ketone, (h) diethyl ketone and methyl n-propyl ketone, (c) pentanal and 2,2-dimethylpropanal, d) 2-pentanol and 2-pentanone. 

The photodecomposition of perfluoro diethyl-62 and perfluoro-di-w-propyl63 ketones has been shown to follow a course similar to that of hexa-fluoroacetone. The fluorescence is weaker in the case of the perfluoro-diethyl ketone and almost absent in the case of the perfluorodi-n-propyl ketone, and the pressure dependence of the quantum yields of carbon monoxide is consistent with this behavior. It is proposed that in the more complex structures, the energy may more easily be accommodated and lost by internal conversion, thereby reducing the contribution made by fluorescence and by Collisional quenching of the excited molecule. 

Our investigations have been concerned with acetone (8), methyl ethyl ketone, and diethyl ketone, and have been conducted in a static... 

Figure 5. Effect of addition of formaldehyde on slow combustion of 40 mm. of diethyl ketone and 40 mm. of oxygen at 400°C. (1)...

Obtained by the action of sodium on mixtures of ethyl bromide and diethyl ketone and of ethyl bromide and ethyl propionate in 17 per cent and 9 per cent yields. Morton and Stevens, J. Am. Chem. Soc., 53, 2244 (1931)... 

The use of diethyl ketone and diisopropyl ketone for this reaction also achieved excellent enantiose-lectivity (98-99 % ee). Under the same reaction conditions, (/ )-BINAP (58)/Rh catalyst exhibited somewhat lower enantioselectivity (83-95% ee). 

Unhindered aliphatic ketones selectively yield E-enolates if they are deprotonated by a lithium amide via a transition state structure of type A of Figure 13.15. This occurs, for example, when the B-type transition state is destabilized because of the use of a base that is even more sterically demanding than LDA such as, for example, LTMP (for structure, see Figure 4.18). For example, diethyl ketone and LTMP form the if-enolate with ds = 87 13. 

The photolysis of a mixture of oxygen-18, diethyl ketone, and azoethane under conditions in which only the azoethane absorbed did not result in the formation of diethyl ketone-18. In other words, ethyl radicals are not sufficient to lead to the formation of diethyl ketone-18. 

At 3130 A. reaction (00) predominates and the relative contributions of (60) and (61) have been shown to be in the ratio of 20 or 30 to 1. This ratio decreases with decreasing wavelength to about 2 at 2537 A. The photooxidation has not been studied, but it would parallel the photooxidations of diethyl ketone and acetone. 

The catalyst used in the process was a Fischer-Tropsch cobalt-thoria catalyst. The temperature was usually between 130-160° and a total pressure of 200 atm. of water gas (1II2 ICO) was usually employed. The reaction was carried out first with ethylene and the products were found to consist of a mixture of diethyl ketone and propionaldehyde. As both products contained a carbonyl or oxo group, the reaction was called the Oxo synthesis. Later it was found that ketone production was relatively unimportant aldehydes were almost always the principal... 

Diethyl ketone and nitrogen iodide in 2,5 -Diethy 1-3,6-dimethy Ipyrazine 512... 

In general, the yields in aluminum isopropoxide reductions range from 80 to 100%. With a few low-boiling ketones difficulty may be experienced in separating the resulting alcohol from isopropyl alcohol thus the yields of reduction products from diethyl ketone and methoxyacetone are reported to be 60% and 40%, respectively. Di-n-propyl ketone, on the other hand, gives a 92% yield of the carbinol. As would be expected, side reactions are more significant and the yields are consequently lower when extremely sensitive compounds, such as unsaturated aldehydes and the carotenoids, are reduced. 

In early patents by Halcon, molybdenum carbonyls are claimed to be active catalysts in the presence of nickel and iodide [23]. Iridium complexes are also reported to be active in the carbonylation of olefins, in the presence of other halogen [24] or other promoting co-catalysts such as phosphines, arsines, and stibines [25]. The formation of diethyl ketone and polyketones is frequently observed. Iridium catalysts are in general less active than comparable rhodium systems. Since the water-gas shift reaction becomes dominant at higher temperatures, attempts to compensate for the lack of activity by increasing the reaction temperature have been unsuccessful. 

Properties Crystals. Mp 95C. Partially soluble in acetone, diethyl ketone, and chloroform almost insoluble in water. 

The production of peroxypropionyl nitrate from diethyl ketone and ethyl ferf-butyl ketone via the conventional reactions... 

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